Answer: The British first assumed control of India by fighting a terrible war.
Step-by-step explanation:
Under the British East India Company, the British were able to conquer most of India over a century by fighting various wars against the different kingdoms and empires controlling India.
They fought against the Maratha empire, the Mughal empire, the kingdom of Mysore, the Bengals and their allies. The various victories they scored helped them take territory gradually till the British ruled supreme in Indi.